They meet Brandon at a coffee shop when suddenly Berger shows up, roughs up Brandon and tells him he has until Monday to get him his money. Brandon tells Shawn and Gus that he lost everything he stole from his dad and more to Berger. He can't go back until he wins it back. He's actually a really good player and can't figure out how he keeps losing to Berger. Shawn advises him to go back to his dad and together figure out a way to pay Berger back. It's that or jail. Peterson's done enabling him. Brandon agrees, and he takes off his lucky charm necklace as the guys drop him off at his dad's car lot.
Meanwhile, Juliet has been sneaking around trying to plan Lassiter's party. She finds an address book in his desk and is happy to have a guest list.
Henry summons Shawn to the car lot at the crack of dawn the next morning. It turns out Brandon waited until his father went home, snuck in, opened the safe and stole a sack full of cash.
Shawn, thinking Brandon must be a great poker player with that bluff he just pulled on them, reviews the surveillance tape of Brandon's robbery with Gus. He notices the lucky charm back around Brandon's neck and figures he's gone to play Berger again. Gus says there's only one place Berger will be this weekend - the World Poker Derby. They grab Henry and Peterson and head to the casino. They find Brandon but it's too late. He's already paid his entrance fee and there are no refunds. Shawn decides to play in his place and manages to psych people out all the way to the finals with Berger, where he notices the dealer is wearing the same bracelet he saw at Garden Works. He figures out that Berger and the dealer have been working together, cheating. That's why Brandon kept losing. He discovers the cards are marked and security guards come and haul Berger and the dealer away. Shawn gives his winnings to Peterson, who hands Shawn a bundle of cash for his services, and heads out with Brandon, on the way to healing their broken relationship. With cash in hand, Gus has dreams of an office upgrade but Shawn proceeds to lose it all on one turn of the roulette wheel.
At Lassiter's house, Shawn, Gus and Juliet wait with some shady looking characters for the birthday boy to show up for his surprise party. The real surprise, it turns out, is that all the guests are former collars of Lassiter's, who keeps their addresses on file to keep tabs on them. With them all now knowing where he lives, he goes inside to pack.